Mechanical gong.



[VENTOR Attorney Patented June 26, I900.

lllllll H B. HARRIS.

MECHANICAL GONG.

uuun (Application filed Nov. 6, 1899.)

(No Model.)

IVITNJSES THE cams v cast in a single piece and is provided with aCHARLES R. HARRIS, OF WILLIAMSPORT, PENNSYLVANIA, ASSIGNOR TO THE HARRISSAFETY COMPANY, OF NEWV YORK, N. Y.

MECHANICAL cone.

SPECIFICATION forming part of Letters latent N 0. 652,361, dated June26, 1900. Application filed November 6, 1899. $erial No 735,983. (Nomodel.)

To ctZZ whom it may concern:

Be it known that I, CHARLES R. HARRIS, of Williamsport, in the county ofLycoming and Stateof Pennsylvania, have invented certain new and usefulImprovements in Mechanical Gongs; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

My invention relates to an improvement in mechanical gongs adapted,primarily, for sounding an alarm in the event of a fire within oradjacent to the premises protected by the gong; and it consists incertain novel features of construction and combinations of parts, aswill be hereinafter more fully described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a face view of my improvedalarmwith the gong removed. Fig. 2 is a side elevation, and Fig. 3 is asectional view.

A represents a circular base-plate or support provided along itsouteredge with a series of projecting perforated ears 1, by means ofwhich the base or support is secured to the wall or other convenientpart of a building. This plate or support A is provided at a suitablepoint on its peripheral edge with a stop 2, for the purpose to behereinafter explained, and at its center with a hole or opening in whichthe inner end of stationary shaft or post 3 is rigidly secured,whichlatt er is'provided adjacent to the base-plate A with a smoothsurface 4 and at its reduced end-with screw-threads 5, while theintermediate sec: tion thereof is provided with screw-threads 6, saidintermediate section being of a diameter greater than that of thereduced section and of less diameter than that of the smooth section.The smooth section 4: of shaft 3 constitutes an axle on which the drum7, now to be described, revolves. Drum 7 is preferably wide peripheralgroove 8, the flange 9 of which is provided with astop 10, adapted toengage the stop 2, formed on the peripheral edge of plate A, forlimiting the movement of said drum, while the flange 11 is provided withan arm 12, projecting at right angles thereto, for engaging thegong-sounding mechanism,here= inafter to be described. The drum 7 ishollow and is open on one face, and is open on its face which restsadjacent to the plate or support A, and is provided on its opposite sidewith a series of flat thin spokes 15, carrying the centralinwardly-projecting hub 16. Secured to the hub is one end of theribbonspring 17, the opposite end of said spring being removably securedto the post 18, carried by plate A. Within peripheral groove 8 of drum 7is secured one end of cable 19, which latter extends from said drum tovarious points, either up or down, throughout the building in which thegong is secured.

In assembling the parts and before the drum 7 is permanently locked inposition the cable 19 is passed several times around the drum, and oneor more of said turns of the cable are then drawn oif bya straight pull,which winds up the spring. By now forcing the drum to. its seat, so thatthe stop thereon will abut against the stop 2, the spring 17 is heldunder tension.

14. is a disk corresponding in size with the drum 7 and providedcentrally with a screwthreaded hub 22 for its attachment to screwsection6 of the stationary post or shaft 3. This disk 14 is locked in placeagainst movement by a lock-nut 23 and carries a gongtripping lever 13,which latter projects beyond the periphery thereof in a position to beengaged by the arm 12 on the drum 7. This tripping-lever 13 is pivotedto the disk 14 and p is engaged by a spring 15, which latter tends tonormally hold the tooth 16 of the trippinglever in contact with thetoothed wheel 17 of the striking-train 18. From this it will be seenthat when the drum is released and permitted to turn on its bearing thearm 12 thereon engages the tripping-lever and moves the latter out ofcontact with the strikingtrain, thus permitting the latter to actuatethe hammer of the gong.

' The gong 20 is provided with a central hole for the passage of thereduced threaded end of shaft or post 3, the said gong being supportedon the shoulder 21, formed at the juncture of the two threaded sectionsof said post or shaft, the gong being held against movement by a nut22". This gong 20 is also provided, adjacent to its central opening,with a second hole through which the key end of shaft 23 of the'clockmechanism projects and by means of which the spring 2a is wound. Thegong thus assembled is ready to be placed in position, and after thebase-plate or support A has been secured to the wall or other supportthe cable 19 is carried one or more times around the drum 7 and thenpulled taut, partly unwinding the cable, so as to separate the stop 10on the drumfrom the stop 2 on the base-plate or support. This cable isthen passed through the building, and its free end is secured so as tohold the cable under tension, fusible plugs 26 being interposed in thecable at suitable intervals. It will now be seen that if any one of theplugs be destroyed by reason of excessive or abnormal temperature thetension of the cable is destroyed, thus releasing the drum andpermitting the same to turn until the stop 10 engages the stop 2 on thebaseplate. Just before these stops last mentioned engage each other thearm 12 on the drum engages the gong-tripping lever, thus releasing thegong-train and sounding an alarm, which can be heard throughout thebuilding. If desired, this gong can be placed on the outside of abuilding, so as to attract attention from the outside.

It is evident that changes in the construction and relative arrangementof the several parts might be made without avoiding my invention, andhence I would have it understood that I do not restrict myself to theparticular construction and arrangement of parts shown and described;but,

Having fully described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is

1. In an alarm, the combination with a support, a gong, and a motor forringing the gong, of a drum, a cord or wire secured at one end to thedrum and adapted to be attached at its other end to a fixed support,means for putting tension on said cord or wire and a trip controlled bythe drum for releasing the motor when the tension on the cord or wire isreleased or removed.

2. In an alarm, the combination with a support, of a spring-actuateddrum mounted on said support, a gong and a motor therefor connected withthe support, a trip for the motor controlled by the drum and a cord orWire having one or more fusible sections, one end of said cord or wirebeing secured to said drum.

3. In an alarm,the combination with a baseplate, a post projecting fromthe center thereof and a disk spaced from the base-plate and secured tosaid post, of a revoluble drum mounted on said post between thebase-plate and disk, a motor tending to rotate said drum, a gongsupported by the post, a motor for ringing the gong, a trip-arm pivotedto the disk and adapted to normally engage a part of the gong-motor tonormally retain it at rest and an arm on the drum to move saidtrip-lever to release the gong-motor when said drum is released.

4. In an alarm, the combination with a frame, a gong and a motortherefor mounted on the frame, of a revoluble drum mounted on the frame,means for causing said drum to rotate in one direction, aspring-actuated trip-lever mounted on the frame and adapted to engage apart of said motor to hold the same normally at rest, an arm on the drumto actuate said trip-lever and cooperating stops on the drum and framefor limiting the movement of the drum.

5. In an alarm,the combination with a baseplate, a post projecting fromthe center thereof and a disk spaced from the base-plate and secured tosaid post, of a revoluble drum mounted on said post between thebase-plate and disk, a motor tending to rotate said drum, a cord or Wirehaving one or more fusible sections, one end of said cord or wire beingattached to said drum, a gong supported by the post, a motor for ringingthe gong, a trip-arm pivoted to the disk and adapted to normally engagea part of said motor for looking it and an arm on the drum to move saidtrip-lever to release the gong-motor when said drum is released.

6. In an alarm, the combination with a baseplate, a post projecting fromthe center thereof and a disk spaced from the base-plate and secured tosaid post and a stop secured on said base-plate, of a revoluble drummounted on said post between the base-plate and disk, a stop on saiddrum for engaging the stop on the base-plate, a spring for impartingtension to the drum, one end of said spring being secured to said drumand the opposite end to the base-plate, a gong supported bythe post,clock mechanism for ringing the gong, a spring-actuated trip-leverpivoted to the disk and adapted to normally engage a part of the clockmechanism to lock it and an arm on the drum to move said trip-lever torelease the gong-motor when said drum is released.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

CHAS. R. HARRIS.

Witnesses:

R. F. ALLEN, E. G. WILHELM.

